resharing

package
v2.1.5 Latest Latest
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 Go to latest Published: Mar 24, 2026 License: MIT Imports: 21 Imported by: 0

Documentation

Index

Constants

View Source 
const (
	TaskName = "ecdsa-resharing"
)

Variables

View Source 
var File_protob_ecdsa_resharing_proto protoreflect.FileDescriptor

Functions

func NewDGRound1Message 

func NewDGRound1Message(
	to []*tss.PartyID,
	from *tss.PartyID,
	ecdsaPub *crypto.ECPoint,
	vct cmt.HashCommitment,
	ssid []byte,
) tss.ParsedMessage

NewDGRound1Message creates a broadcast message for resharing round 1 containing the ECDSA public key, commitment, and SSID.

func NewDGRound2Message1 

func NewDGRound2Message1(
	to []*tss.PartyID,
	from *tss.PartyID,
	paillierPK *paillier.PublicKey,
	modProof *modproof.ProofMod,
	NTildei, H1i, H2i *big.Int,
	dlnProof1, dlnProof2 *dlnproof.Proof,
) (tss.ParsedMessage, error)

NewDGRound2Message1 creates a broadcast message for resharing round 2 containing the Paillier key, modulus proof, and DLN proofs.

func NewDGRound2Message2 

func NewDGRound2Message2(
	to []*tss.PartyID,
	from *tss.PartyID,
) tss.ParsedMessage

NewDGRound2Message2 creates a broadcast message from the new committee to the old committee signaling readiness.

func NewDGRound3Message1 

func NewDGRound3Message1(
	to *tss.PartyID,
	from *tss.PartyID,
	share *vss.Share,
) tss.ParsedMessage

NewDGRound3Message1 creates a point-to-point message for resharing round 3 containing a VSS share.

func NewDGRound3Message2 

func NewDGRound3Message2(
	to []*tss.PartyID,
	from *tss.PartyID,
	vdct cmt.HashDeCommitment,
) tss.ParsedMessage

NewDGRound3Message2 creates a broadcast message for resharing round 3 containing the VSS de-commitment.

func NewDGRound4Message1 

func NewDGRound4Message1(
	to *tss.PartyID,
	from *tss.PartyID,
	proof *facproof.ProofFac,
) tss.ParsedMessage

NewDGRound4Message1 creates a point-to-point message for resharing round 4 containing the factorization proof.

func NewDGRound4Message2 

func NewDGRound4Message2(
	to []*tss.PartyID,
	from *tss.PartyID,
) tss.ParsedMessage

NewDGRound4Message2 creates a broadcast message for resharing round 4 sent to both old and new committees.

func NewLocalParty 

func NewLocalParty(
	params *tss.ReSharingParameters,
	key keygen.LocalPartySaveData,
	out chan<- tss.Message,
	end chan<- *keygen.LocalPartySaveData,
) tss.Party

Exported, used in `tss` client The `key` is read from and/or written to depending on whether this party is part of the old or the new committee. You may optionally generate and set the LocalPreParams if you would like to use pre-generated safe primes and Paillier secret. (This is similar to providing the `optionalPreParams` to `keygen.LocalParty`).

Types

type DGRound1Message 

type DGRound1Message struct {
	EcdsaPubX   []byte `protobuf:"bytes,1,opt,name=ecdsa_pub_x,json=ecdsaPubX,proto3" json:"ecdsa_pub_x,omitempty"`
	EcdsaPubY   []byte `protobuf:"bytes,2,opt,name=ecdsa_pub_y,json=ecdsaPubY,proto3" json:"ecdsa_pub_y,omitempty"`
	VCommitment []byte `protobuf:"bytes,3,opt,name=v_commitment,json=vCommitment,proto3" json:"v_commitment,omitempty"`
	Ssid        []byte `protobuf:"bytes,4,opt,name=ssid,proto3" json:"ssid,omitempty"`
	// contains filtered or unexported fields
}

The Round 1 data is broadcast to peers of the New Committee in this message.

func (*DGRound1Message) Descriptor deprecated 

func (*DGRound1Message) Descriptor() ([]byte, []int)

Deprecated: Use DGRound1Message.ProtoReflect.Descriptor instead.

func (*DGRound1Message) GetEcdsaPubX 

func (x *DGRound1Message) GetEcdsaPubX() []byte

func (*DGRound1Message) GetEcdsaPubY 

func (x *DGRound1Message) GetEcdsaPubY() []byte

func (*DGRound1Message) GetSsid 

func (x *DGRound1Message) GetSsid() []byte

func (*DGRound1Message) GetVCommitment 

func (x *DGRound1Message) GetVCommitment() []byte

func (*DGRound1Message) ProtoMessage 

func (*DGRound1Message) ProtoMessage()

func (*DGRound1Message) ProtoReflect 

func (x *DGRound1Message) ProtoReflect() protoreflect.Message

func (*DGRound1Message) Reset 

func (x *DGRound1Message) Reset()

func (*DGRound1Message) String 

func (x *DGRound1Message) String() string

func (*DGRound1Message) UnmarshalECDSAPub 

func (m *DGRound1Message) UnmarshalECDSAPub(ec elliptic.Curve) (*crypto.ECPoint, error)

UnmarshalECDSAPub deserializes the ECDSA public key from the message.

func (*DGRound1Message) UnmarshalSSID 

func (m *DGRound1Message) UnmarshalSSID() []byte

UnmarshalSSID deserializes the session identifier from the message.

func (*DGRound1Message) UnmarshalVCommitment 

func (m *DGRound1Message) UnmarshalVCommitment() *big.Int

UnmarshalVCommitment deserializes the VSS commitment from the message.

func (*DGRound1Message) ValidateBasic 

func (m *DGRound1Message) ValidateBasic() bool

ValidateBasic checks that all required fields in the resharing round 1 message are non-empty.

type DGRound2Message1 

type DGRound2Message1 struct {
	PaillierN  []byte   `protobuf:"bytes,1,opt,name=paillier_n,json=paillierN,proto3" json:"paillier_n,omitempty"`
	ModProof   [][]byte `protobuf:"bytes,2,rep,name=modProof,proto3" json:"modProof,omitempty"`
	NTilde     []byte   `protobuf:"bytes,3,opt,name=n_tilde,json=nTilde,proto3" json:"n_tilde,omitempty"`
	H1         []byte   `protobuf:"bytes,4,opt,name=h1,proto3" json:"h1,omitempty"`
	H2         []byte   `protobuf:"bytes,5,opt,name=h2,proto3" json:"h2,omitempty"`
	Dlnproof_1 [][]byte `protobuf:"bytes,6,rep,name=dlnproof_1,json=dlnproof1,proto3" json:"dlnproof_1,omitempty"`
	Dlnproof_2 [][]byte `protobuf:"bytes,7,rep,name=dlnproof_2,json=dlnproof2,proto3" json:"dlnproof_2,omitempty"`
	// contains filtered or unexported fields
}

The Round 2 data is broadcast to other peers of the New Committee in this message.

func (*DGRound2Message1) Descriptor deprecated 

func (*DGRound2Message1) Descriptor() ([]byte, []int)

Deprecated: Use DGRound2Message1.ProtoReflect.Descriptor instead.

func (*DGRound2Message1) GetDlnproof_1 

func (x *DGRound2Message1) GetDlnproof_1() [][]byte

func (*DGRound2Message1) GetDlnproof_2 

func (x *DGRound2Message1) GetDlnproof_2() [][]byte

func (*DGRound2Message1) GetH1 

func (x *DGRound2Message1) GetH1() []byte

func (*DGRound2Message1) GetH2 

func (x *DGRound2Message1) GetH2() []byte

func (*DGRound2Message1) GetModProof 

func (x *DGRound2Message1) GetModProof() [][]byte

func (*DGRound2Message1) GetNTilde 

func (x *DGRound2Message1) GetNTilde() []byte

func (*DGRound2Message1) GetPaillierN 

func (x *DGRound2Message1) GetPaillierN() []byte

func (*DGRound2Message1) ProtoMessage 

func (*DGRound2Message1) ProtoMessage()

func (*DGRound2Message1) ProtoReflect 

func (x *DGRound2Message1) ProtoReflect() protoreflect.Message

func (*DGRound2Message1) Reset 

func (x *DGRound2Message1) Reset()

func (*DGRound2Message1) String 

func (x *DGRound2Message1) String() string

func (*DGRound2Message1) UnmarshalDLNProof1 

func (m *DGRound2Message1) UnmarshalDLNProof1() (*dlnproof.Proof, error)

UnmarshalDLNProof1 deserializes the first DLN proof from the message.

func (*DGRound2Message1) UnmarshalDLNProof2 

func (m *DGRound2Message1) UnmarshalDLNProof2() (*dlnproof.Proof, error)

UnmarshalDLNProof2 deserializes the second DLN proof from the message.

func (*DGRound2Message1) UnmarshalH1 

func (m *DGRound2Message1) UnmarshalH1() *big.Int

UnmarshalH1 deserializes the H1 value from the message.

func (*DGRound2Message1) UnmarshalH2 

func (m *DGRound2Message1) UnmarshalH2() *big.Int

UnmarshalH2 deserializes the H2 value from the message.

func (*DGRound2Message1) UnmarshalModProof 

func (m *DGRound2Message1) UnmarshalModProof() (*modproof.ProofMod, error)

UnmarshalModProof deserializes the modulus proof from the message.

func (*DGRound2Message1) UnmarshalNTilde 

func (m *DGRound2Message1) UnmarshalNTilde() *big.Int

UnmarshalNTilde deserializes the NTilde value from the message.

func (*DGRound2Message1) UnmarshalPaillierPK 

func (m *DGRound2Message1) UnmarshalPaillierPK() *paillier.PublicKey

UnmarshalPaillierPK deserializes the Paillier public key from the message.

func (*DGRound2Message1) ValidateBasic 

func (m *DGRound2Message1) ValidateBasic() bool

ValidateBasic checks that all required fields in the resharing round 2 message 1 are non-empty.

type DGRound2Message2 

type DGRound2Message2 struct {
	// contains filtered or unexported fields
}

The Round 2 "ACK" is broadcast to peers of the Old Committee in this message.

func (*DGRound2Message2) Descriptor deprecated 

func (*DGRound2Message2) Descriptor() ([]byte, []int)

Deprecated: Use DGRound2Message2.ProtoReflect.Descriptor instead.

func (*DGRound2Message2) ProtoMessage 

func (*DGRound2Message2) ProtoMessage()

func (*DGRound2Message2) ProtoReflect 

func (x *DGRound2Message2) ProtoReflect() protoreflect.Message

func (*DGRound2Message2) Reset 

func (x *DGRound2Message2) Reset()

func (*DGRound2Message2) String 

func (x *DGRound2Message2) String() string

func (*DGRound2Message2) ValidateBasic 

func (m *DGRound2Message2) ValidateBasic() bool

ValidateBasic always returns true as this message carries no payload.

type DGRound3Message1 

type DGRound3Message1 struct {
	Share []byte `protobuf:"bytes,1,opt,name=share,proto3" json:"share,omitempty"`
	// contains filtered or unexported fields
}

The Round 3 data is sent to peers of the New Committee in this message.

func (*DGRound3Message1) Descriptor deprecated 

func (*DGRound3Message1) Descriptor() ([]byte, []int)

Deprecated: Use DGRound3Message1.ProtoReflect.Descriptor instead.

func (*DGRound3Message1) GetShare 

func (x *DGRound3Message1) GetShare() []byte

func (*DGRound3Message1) ProtoMessage 

func (*DGRound3Message1) ProtoMessage()

func (*DGRound3Message1) ProtoReflect 

func (x *DGRound3Message1) ProtoReflect() protoreflect.Message

func (*DGRound3Message1) Reset 

func (x *DGRound3Message1) Reset()

func (*DGRound3Message1) String 

func (x *DGRound3Message1) String() string

func (*DGRound3Message1) ValidateBasic 

func (m *DGRound3Message1) ValidateBasic() bool

ValidateBasic checks that the share field in the resharing round 3 message 1 is non-empty.

type DGRound3Message2 

type DGRound3Message2 struct {
	VDecommitment [][]byte `protobuf:"bytes,1,rep,name=v_decommitment,json=vDecommitment,proto3" json:"v_decommitment,omitempty"`
	// contains filtered or unexported fields
}

The Round 3 data is broadcast to peers of the New Committee in this message.

func (*DGRound3Message2) Descriptor deprecated 

func (*DGRound3Message2) Descriptor() ([]byte, []int)

Deprecated: Use DGRound3Message2.ProtoReflect.Descriptor instead.

func (*DGRound3Message2) GetVDecommitment 

func (x *DGRound3Message2) GetVDecommitment() [][]byte

func (*DGRound3Message2) ProtoMessage 

func (*DGRound3Message2) ProtoMessage()

func (*DGRound3Message2) ProtoReflect 

func (x *DGRound3Message2) ProtoReflect() protoreflect.Message

func (*DGRound3Message2) Reset 

func (x *DGRound3Message2) Reset()

func (*DGRound3Message2) String 

func (x *DGRound3Message2) String() string

func (*DGRound3Message2) UnmarshalVDeCommitment 

func (m *DGRound3Message2) UnmarshalVDeCommitment() cmt.HashDeCommitment

UnmarshalVDeCommitment deserializes the VSS de-commitment from the message.

func (*DGRound3Message2) ValidateBasic 

func (m *DGRound3Message2) ValidateBasic() bool

ValidateBasic checks that the de-commitment field in the resharing round 3 message 2 is non-empty.

type DGRound4Message1 

type DGRound4Message1 struct {
	FacProof [][]byte `protobuf:"bytes,1,rep,name=facProof,proto3" json:"facProof,omitempty"`
	// contains filtered or unexported fields
}

The Round 4 message to peers of New Committees from the New Committee in this message.

func (*DGRound4Message1) Descriptor deprecated 

func (*DGRound4Message1) Descriptor() ([]byte, []int)

Deprecated: Use DGRound4Message1.ProtoReflect.Descriptor instead.

func (*DGRound4Message1) GetFacProof 

func (x *DGRound4Message1) GetFacProof() [][]byte

func (*DGRound4Message1) ProtoMessage 

func (*DGRound4Message1) ProtoMessage()

func (*DGRound4Message1) ProtoReflect 

func (x *DGRound4Message1) ProtoReflect() protoreflect.Message

func (*DGRound4Message1) Reset 

func (x *DGRound4Message1) Reset()

func (*DGRound4Message1) String 

func (x *DGRound4Message1) String() string

func (*DGRound4Message1) UnmarshalFacProof 

func (m *DGRound4Message1) UnmarshalFacProof() (*facproof.ProofFac, error)

UnmarshalFacProof deserializes the factorization proof from the message.

func (*DGRound4Message1) ValidateBasic 

func (m *DGRound4Message1) ValidateBasic() bool

ValidateBasic checks that the round 4 message 1 is non-nil.

type DGRound4Message2 

type DGRound4Message2 struct {
	// contains filtered or unexported fields
}

The Round 4 "ACK" is broadcast to peers of the Old and New Committees from the New Committee in this message.

func (*DGRound4Message2) Descriptor deprecated 

func (*DGRound4Message2) Descriptor() ([]byte, []int)

Deprecated: Use DGRound4Message2.ProtoReflect.Descriptor instead.

func (*DGRound4Message2) ProtoMessage 

func (*DGRound4Message2) ProtoMessage()

func (*DGRound4Message2) ProtoReflect 

func (x *DGRound4Message2) ProtoReflect() protoreflect.Message

func (*DGRound4Message2) Reset 

func (x *DGRound4Message2) Reset()

func (*DGRound4Message2) String 

func (x *DGRound4Message2) String() string

func (*DGRound4Message2) ValidateBasic 

func (m *DGRound4Message2) ValidateBasic() bool

ValidateBasic always returns true as this message carries no payload.

type LocalParty 

type LocalParty struct {
	*tss.BaseParty
	// contains filtered or unexported fields
}

LocalParty represents a local participant in the ECDSA key resharing protocol.

func (*LocalParty) FirstRound 

func (p *LocalParty) FirstRound() tss.Round

FirstRound returns the first round of the ECDSA resharing protocol.

func (*LocalParty) PartyID 

func (p *LocalParty) PartyID() *tss.PartyID

PartyID returns the party's unique identifier.

func (*LocalParty) Start 

func (p *LocalParty) Start() error

Start begins the resharing protocol for this party.

func (*LocalParty) StoreMessage 

func (p *LocalParty) StoreMessage(msg tss.ParsedMessage) (bool, error)

StoreMessage validates and stores a protocol message in the appropriate round message slot.

func (*LocalParty) String 

func (p *LocalParty) String() string

String returns a human-readable representation of this party.

func (*LocalParty) Update 

func (p *LocalParty) Update(msg tss.ParsedMessage) (ok bool, err error)

Update processes a parsed protocol message for this party.

func (*LocalParty) UpdateFromBytes 

func (p *LocalParty) UpdateFromBytes(wireBytes []byte, from *tss.PartyID, isBroadcast bool) (bool, error)

UpdateFromBytes parses raw wire bytes into a message and updates this party.

func (*LocalParty) ValidateMessage 

func (p *LocalParty) ValidateMessage(msg tss.ParsedMessage) (bool, error)

ValidateMessage checks that the given message is well-formed and from a valid sender index.

Source Files

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